Condensate Polishing

In processes where boiler water is recycled after use, such as in the power generation industry, a condensate polishing system is used to remove ionic contamination, trace hardness, Silica and other corrosive agents.

There are three basic types of condensate polishing systems: Mixed Bed External Regen, Mixed Bed In-situ Regen and Cation Polishers (Sodium and Amine cycles). The key difference between these systems is the regeneration method used – external regeneration produces a more highly polished condensate quality because it reduces cross contamination of the resin beds. And because chemicals are not introduced directly into the system, there is no chance of their entering the process stream.

ConeSep™ External Regen Systems are comprised of three separate vessels that enable you to operate with flexible resin volumes and to regenerate resins externally, virtually eliminating any chance of cross contamination. ConeSep™ systems also provide extremely reliable operation.

1st Vessel: Separation and Anion regeneration.
2nd Vessel: Cation regeneration and storage tank.
3rd Vessel: Interface vessel where cross-contaminated resin is held for separation.

Mixed Bed In-situ Regen Condensate Polishers perform all operations inside a single vessel. Adding inert resin to the condensate polisher bed can reduce cross contamination in in-situ regenerated systems.

Amine and Sodium Cycle Condensate Polishers are essentially co-current ion exchange systems with a resin bed that removes
suspended solids (corrosion residuals) and cationic contamination from recycled process water. Amine polishers exchange Amine for trace hardness. Sodium polishers exchange Sodium for trace hardness. The choice of whether to use a Sodium or Amine polishing unit is determined by the type of boiler system used, and whether Sodium leakage into the boiler is a concern.

 

 

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